Powder Charge Relaxation Time Testing
Our UK laboratory generates electrostatic test data for your liquids. The liquid conductivity test is conducted to establish whether a liquid will allow an electrical charge to migrate through it or not and therefore evaluate its ability to accumulate and retain a charge.
The Sigma-HSE Advantage
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Frequently asked questions
What are your Standards & Schedule of Accreditation?
BS 7506 & BS 5958
How does the Powder Charge Relaxation Time test work?
The material to be tested is placed into an earthed stainless steel sample cup and using corona charging the sample is sprayed with a potential of approximately 10 kV. The charging plate is retracted, revealing the charged material to the field meter and the acquisition system process is automatically initiated.
The sample voltage is monitored and recorded by the electrostatic field meter, and voltage versus time is graphically displayed using the acquisition software connected to the field meter output.
How can Powder Charge Relaxation data help?
Charge relaxation time or charge decay constant is a very good indication of a material’s ability or failure to self-dissipate energy or static charge.
A dissipative material will allow energy or charge to migrate over its surface and/or through its volume in a time that is short compared to an insulating material, for example, which will exhibit a long undesirable charge relaxation time.